Matlab 互相关

我一直在试图找到一个时移信号响应和另一个作为参考的信号响应之间的互相关，但发现很难用xcorr函数来反映我的时移。matlab代码粘贴在下面，如果有人能就如何实现xcorr函数提出建议，以便我能够确定两个信号响应相关的时间偏移，我将不胜感激。多谢各位

clear all;
clc;
FS = 100e6;



figure(1)
AMP8 = importdata('av250nu.txt');
time8  = [1:length(AMP8)] / FS;
c=find(time8==0.14e-4);
plot(time8(1:c)',AMP8(1:c));
ylabel('Amplitude(V)')
xlabel('Time of flight(s)')

figure(2)
AMP = importdata('3kknu.txt');
time  = [1:length(AMP)] / FS;
c=find(time==0.14e-4);
plot(time(1:c)',AMP(1:c));
title('reference')
ylabel('Amplitude(V)')
xlabel('Time of flight(s)')

figure(3)
AMP1 = zeros(2000,1);
time1 = zeros(2000,1);
time11 = zeros(2000,1);
AMP1(1:320)= AMP(1:320);
time1(1:320) = time(1:320);
plot(time1,AMP1);
ylabel('Amplitude(V)')
xlabel('Time of flight(s)')

figure(4)
AMP2 = zeros(2000,1);
time2 = zeros(2000,1);
time21 = zeros(2000,1);
AMP2(321:640) = AMP(321:640);
time2(321:640) = time(321:640);
time21(321:640) = time2(321:640);
plot(time21,AMP2);
ylabel('Amplitude(V)')
xlabel('Time of flight(s)')

figure(5)
AMP3 = zeros(2000,1);
time3 = zeros(2000,1);
time31 = zeros(2000,1);
AMP3(641:960) = AMP(641:960);
time3(641:960) = time(641:960);
time31(641:960) = time3(641:960);
plot(time31,AMP3);
ylabel('Amplitude(V)')
xlabel('Time of flight(s)')

figure(6)
AMP4 = zeros(2000,1);
time4 = zeros(2000,1);
time41 = zeros(2000,1);
AMP4(961:1280) = AMP(961:1280);
time4(961:1280) = time(961:1280);
time41(961:2000) = time4(961:2000);
plot(time41,AMP4);
ylabel('Amplitude(V)')
xlabel('Time of flight(s)')

figure(75)
time5=zeros(2000,1);
p = zeros(2000,1);
time5(1:320)= time1(1:320); 
time5(321:640)=time21(321:640);
time5(641:960)=time31(641:960);
time5(961:2000)=time41(961:2000);

plot(time5,AMP);

 p(1:2000) = time5;
 p(1:16384) = AMP;
 plot(p);
 grid on;



 figure(95)
 [Z,lags] = XCORR(p(1:16384,1),AMP8,'biased');
 plot(lags,Z);

---

尝试找到相关性的最大值，这是所需的偏移

[zmax, i] = max(Z);
t = lags[i];

---

尝试找到相关性的最大值，这是所需的偏移

[zmax, i] = max(Z);
t = lags[i];

---

这是一个简单问题的大量代码这是一个简单问题的大量代码谢谢，我对代码的问题是，时间变化没有反映在相互关联的回答中。除了xcorr函数外，代码的每一位都很好。有人能就如何编写这两个信号的互相关函数提供建议吗。谢谢Hanks，我对代码的问题是时间偏移没有反映在相互关联的响应中。除了xcorr函数外，代码的每一位都很好。有人能就如何编写这两个信号的互相关函数提供建议吗。非常感谢。